Rhododendron impeditum TINY CLOUD Close out pricing on larger plants. Zones: 5-8. Tiny Cloud has tiny, gray-green leaves and purple flowers in spring. Very slow growth to about 1 foot or less at 10 years, about 18 inches at 25 years. Tiny Cloud has many uses: Bonsai, rock garden, trough, or regular landscape. Needs typical Rhododendron care. These are mature plants shipped in gallon containers 10-14 inches, similar in size and shape in the photos. LiveScaleİChoice-Miniature.